254 



welche manchmal nur undeutlich ausgehildet sind und in die Verlänge- 

 rung der von der Vagina ausstrahlenden Falten fallen. 



Auf Zweigen von Populus euphratica Oliv., Salix persica 

 Boiss. und Salix zygostemon Boiss., Persien. 



Die vorstehenden Zeilen sollen als vorläufige Mitteilung aus einer 

 Untersuchung über die Gattung Lcucaspis dienen. Die Untersuchung 

 wird demnächst im Jahrbuch der hamburgischen wissenschaftlichen 

 Anstalten erscheinen. 



5. Decalopoda and Colossendeis. 



By T. V. Hudg'son, Plymouth, Marine Biological Association. 



eingeg. 14. Juni 1905. 



While in Southern Regions with the Discovery and engaged in the 

 biological investigation of our Winter Quarters from time to time speci- 

 mens of a ten-legged Pycnogonid were captured. I thought then that 

 I had secured a prize which would-alter many existing opinions concern- 

 ing this group. On returning to civilisation I very soon learnt that our 

 Scotch colleagues had also captured some ten -legged Pycnogonids. 

 More recently it has fallen to my lot to describe this group for both 

 Expeditions and the ten legged species being considered of exceptional 

 interest were examined forthwith. The "Discovery" specimens were 

 described in the Annals and Magazine of Natural History for December 

 1904 and owing to their very obvious relationship to Nymphon were 

 given ihe name of Pentanymphon antarcticum. The "Scotia" specimens 

 were fifteen in number and were fully described in the Journal of the 

 Royal Physical Society of Edinburgh Vol. XVI Part 1 which was 

 issued about the end of last April. They proved to be identical with the 

 Decolopoda australis of Eights, a species which has been completely lost 

 sight of for upwards of seventy years and it is extremely curious to 

 notice how many Zoologists were on its track and the different points of 

 view from which they regarded it. 



My present purpose is to correct, certain views of Dr. J. C. C. 

 Loman of Amsterdam, as expressed in this Journal, p. 122. Vol. 28. 

 Eights' description is remarkably accurate and the figure is little, if 

 any, worse tha,n many produced at the present day. As he made it clear 

 that he obtained a number of specimens it is out of the question to consi- 

 der the species as a monstrosity. As a larval form it must be regarded 

 as of somewhat excessive size but to identify it with Colossendeis roMisia 

 of Hoek is surely an error of judgment. Decalopoda is unquestionably 

 a close ally of Colossendeis but it is equally certain that it is very distinct 

 from that genus. My paper on the subject was written at the beginning of 

 January, since which time I have been dealing with the genus Colossendeis 

 andamnow inaposition to add alittle information concerningboth genera. 



I remodelled Eights' generic description as follows. 



"Body, including lateral processes, elhptical, smooth, not always 



